Mack (voice) (1 episode)

(voice)

(voice)

Hamm (voice)

Tom Roan

Milo The Monster Handler (voice)

Caruncle (voice) (2 episodes)

Fritz (voice)

Abe (1 episode)

Rootie (voice)

Yeti (voice) (1 episode)

Adorable (voice) (2 episodes)

Adorable / Bernard (voice) (1 episode)

Bernard (voice) (4 episodes)

Bernard / Arodable (voice) (1 episode)

Hank (1 episode)

George Bennett (5 episodes)

Construction Worker Fennwick (voice)

Dad Everett

Hamm (voice)

Hamm (voice)

Digby Yates (1 episode)

Stan (1 episode)

Hamm (voice)

Daniel Nilwater

Underminer (voice)

Grandpa Growl (voice)

Conrad Baines

Juan Ortodoncia (voice)

Salty (voice)

Major Derlin (voice) (1 episode)

Mack (voice)

Mutt (voice)

Husband Crab (Bill) (voice)

Dr. Charles Burke

Self

Mr. Hartz

Earl (voice)

Fritz (voice)

Self (1 episode)

Mick Vaughn

Warden

Warden Jeffrey Mitchell

Officer Bender (voice)

Logan Walker

Brodi (voice)

Wilford (voice) (1 episode)

Reverend Thomas

Reverend Thomas

Stu Kirchoff (1 episode)

Bill Schumacher (1 episode)

Harland (voice)

Marvin 'Gramps' Livingstone

Judge Elliot Reid (3 episodes)

Yeti (voice)

Walter Nugent (13 episodes)

Walter (26 episodes)

George

Hamm (voice)

Gordon (voice)

Larry Kaswell (1 episode)

Ernest Otto

Clayton

Earl T. Barnum

Hamm (voice)

Hamm (voice)

Mack (voice)

Mike the Angel

Hamm (voice)

Hamm (voice) (3 episodes)

Construction Foreman Tom (voice)

Joe Noll

John (voice)

Art Leroldi

P.T. Flea (voice) (uncredited)

Mustafa (voice)

Self (2 episodes)

Self - Contestant (14 episodes)

Jim Carter

Controller #1

Mack / Hamm Truck / Abominable Snow Plow / P.T. Flea Car (voice)

John Ratzenberger (1 episode)

Brian's Father (uncredited)

Underminer (voice)

(90 episodes)

Fish School (voice)

Fred (4 episodes)

Cliff Clavin (1 episode)

Thomas 'Tucker' Foy

Himself (1 episode)

Yeti (voice)

Charlie Halloran

Glen (1 episode)

Clay Fairfield, P.I.

Merl (1 episode)

Ike Stump (voice) (13 episodes)

Hamm (voice)

Mickey

P.T. Flea (voice)

Mr. Abernathy (1 episode)

Bob (1 episode)

Phil

(1 episode)

Al Calavito

Hinky (voice) (1 episode)

Goat (voice)

Dusty

Director (1 episode)

Mr. Berman (1 episode)

Hamm (Voice) (55 episodes)

Hamm (voice)

Gus Kilamilikimaka (2 episodes)

Director (1 episode)

Cliff Clavin / CGI Homer Simpson (voice) (2 episodes)

Director (2 episodes)

Director (1 episode)

(1 episode)

Cliff Clavin (1 episode)

Marvin Schector

Rigger (voice) (4 episodes)

Cliff Clavin

Walt Caruso

Self

John Ratzenberger (uncredited)

Morris Zapp (6 episodes)

Bill

General Joe Brodsky

Mr. Barnett

Cliff Clavin (1 episode)

Detective

Security Guard on TV

Walt Brewster (1 episode)

Policeman

(1 episode)

American Lieutenant

Cliff Clavin (269 episodes)

Director (4 episodes)

Chief Peck

Phony Cop (1 episode)

Rusty

Communist Leader (uncredited)

(1 episode)

Policeman

Bill Sweeney (2 episodes)

Tarlow

Jimmy

Controller

Drummer

Major Derlin

Staff Sergeant Dexter (1 episode)

Hal Leonard

Cpl Cook

Achmed

Sgt. John Lucas

1st Controller

Fenn

Newshound

U.S. Lieutenant

Sgt. Kopecki

Patron